how to troubleshoot Toyota Highlander Fourth Generation (2020-present) power windows not working

Toyota Highlander Fourth Generation (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

590 words

Problem Statement

Learn how to troubleshoot and fix power windows not working in Toyota Highlander (2020-present). Step-by-step guide with diagnostic and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the negative battery terminal before working on electrical systems.
•Ensure the vehicle is off before conducting any tests to avoid electrical shocks.

Symptoms

•Power windows do not respond when the switches are pressed
•Driver’s window switch illuminates but does not operate the window
•Individual door switches do not activate their respective windows
•No sound of the window motor operating
•Possible blown fuse indicated on the driver’s fuse panel

Diagnostic Steps

1
Inspect the fuse box for a blown fuse related to the power windows.
2
Test the power window switches with a multimeter to check for continuity.
3
Check for power supply at the window motor connector with a multimeter.
4
Inspect the wiring harness for any visible damage or loose connections.
5
Test the window motor directly by applying power from a 12V source.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Flathead screwdriver
•Wire connectors

Parts Required

•Replacement fuse (if blown)
•Power window switch (if faulty)
•Window motor (if defective)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Symptoms

•Power windows do not respond when the switches are pressed

•Driver’s window switch illuminates but does not operate the window

•Individual door switches do not activate their respective windows

•No sound of the window motor operating

•Possible blown fuse indicated on the driver’s fuse panel

Diagnostic Steps

1
Inspect the fuse box for a blown fuse related to the power windows.
2
Test the power window switches with a multimeter to check for continuity.
3
Check for power supply at the window motor connector with a multimeter.
4
Inspect the wiring harness for any visible damage or loose connections.
5
Test the window motor directly by applying power from a 12V source.

Solution

1. Preparation

Gather tools: OBD-II scanner, multimeter, socket set, flathead screwdriver, and wire connectors.
Disconnect the negative battery terminal to ensure safety during repairs.

2. Check and Replace the Fuse

Locate the fuse box: Typically found under the dashboard on the driver's side or in the engine compartment.
Identify the correct fuse: Refer to the owner’s manual for the specific fuse for the power windows.
Remove the fuse: Use the fuse puller or a pair of needle-nose pliers.
Inspect the fuse: Check if the metal strip inside the fuse is broken.
Replace the fuse: If broken, replace it with a new fuse of the same amperage.

3. Test Window Switches

Remove the switch panel: Use a flathead screwdriver to gently pry off the panel around the window switches.
Disconnect the switch: Remove the electrical connector from the switch.
Use the multimeter: Set it to continuity mode and check each switch for proper operation. Replace any faulty switches.

4. Inspect Wiring and Connectors

Visual inspection: Look along the wiring harness for signs of wear, fraying, or damage.
Check connections: Ensure all connectors at the window motor and switch are secure and free of corrosion.
Repair as needed: Use wire connectors to fix any damaged wiring.

5. Test the Window Motor

Access the window motor: Remove the door panel by unscrewing the screws and carefully prying it off.
Disconnect the motor: Unplug the motor's electrical connector.
Direct power test: Use jumper wires to connect the motor directly to a 12V battery. If it operates, the motor is functional; if not, it may need replacement.